Isothermal method and device using periodic direction-change utility water flow

ABSTRACT

The present invention discloses that the thermal energy is transferred through the closed loop divided piping constituted by utility water flow, the water pipe leading to earth surface, fluid pump and isothermal device, etc. or indirectly through the fluid inside the closed loop circuit being constituted by water pipe, fluid pump and isothermal device via thermal conduction method, wherein thermal energy of utility water flow is directly or indirectly transferred to the fluid inside the closed water pipe leading to earth surface, and it is further through the fluid inside closed piping being pumped for periodic flow direction change to perform thermal energy transfer with the target via isothermal device.

BACKGROUND OF THE INVENTION

(a) Field of the invention

The present invention innovatively discloses a particular piping in the utility water system, wherein water flow inside the piping being the thermal energy transfer fluid is indirectly transferred to the thermal energy transfer fluid in another closed piping circuit by thermal conduction method; further, thermal energy transfer fluid inside the closed piping circuit is pumped by the pump for periodic flow direction change and is through the isothermal device to provide isothermal energy transfer between utility water thermal energy and the one of earth surface target.

(b) Description of the Prior Art

The conventional buildings being cooled by air conditioners in the summer and warmed by electric or fuel gas in the winter consume enormous energy; further, as conventional utility water piping being located near earth surface or exposed is frozen with ice in the extreme cold winter, the accumulated snow and frozen ice on the rooftops and roads usually causes disasters, hence, the lower energy consuming strategy for coping with the accumulated snow and frozen ice is required.

SUMMARY OF THE INVENTION

The present invention discloses that the thermal energy is transferred through the closed loop divided piping being constituted by utility water flow inside the underground water pipe being buried under earth layer, the water pipe leading to earth surface, fluid pump and isothermal device, etc. or is transferred indirectly through the fluid inside the closed loop circuit being constituted by water pipe, fluid pump and isothermal device via thermal conduction method, so as the thermal energy of utility water flow inside underground water pipe is directly or indirectly transferred to the fluid inside the closed water pipe leading to earth surface, and it is further through the fluid inside closed piping being pumped for periodic flow direction change to perform thermal energy transfer with the thermal energy transfer target on earth surface via isothermal device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a piping layout between conventional utility water piping and the building.

FIG. 2 is the structure schematic view of the present invention showing that the utility water piping is through the close loop divided piping directly constituted by water pipe, fluid pump and isothermal device to provide indoor isothermal function inside the building.

FIG. 3 is a structural schematic view showing the isothermal functioning system of the present invention being applied for shallow earth surface layer.

FIG. 4 is a structural schematic view showing the isothermal functioning system of the present invention being applied for the target being externally exposed out of earth surface.

FIG. 5 is a structural schematic view showing the isothermal functioning system of the present invention being applied in the interior of the top structure of building.

FIG. 6 is a structural schematic view showing the isothermal functioning system of the present invention being applied to be externally exposed on top of the building.

FIG. 7 is a schematic view of the embodiment showing that the present invention is installed with enclosed type isothermal warm room structure to perform open loop type fluid circulation in the open space.

FIG. 8 is a schematic view of the system embodiment showing that the present invention is installed with an enclosed type isothermal warm room structure to indirectly perform open loop type fluid circulation in the building or internal spaces of other closed or semi-closed building structures.

FIG. 9 is a schematic view of the system embodiment showing that the present invention is installed with an enclosed type isothermal warm room structure to indirectly perform closed loop type fluid circulation in the open space.

FIG. 10 is a schematic view of the system embodiment showing that the present invention is installed with an enclosed type isothermal warm room structure to indirectly perform closed loop type fluid circulation in the building or internal spaces of other closed or semi-closed building structures.

FIG. 11 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform open loop type fluid circulation in the open space.

FIG. 12 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform open loop type fluid circulation in the building or internal spaces of other closed or semi-closed structures.

FIG. 13 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform closed loop type fluid circulation in the open space.

FIG. 14 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform closed loop type fluid circulation in the buildings or internal spaces of other closed or semi-closed structures.

Description of Main Component Symbols

-   101: Earth surface -   102: earth layer -   103: Underground water pipe -   104: Water supply branch pipe -   110: Building -   111: Water valve -   121: Closed water pipe -   122: Isothermal device -   123: Bidirectional fluid pumping device -   124: Filter device -   218: Fluid inlet -   219: Fluid outlet -   220: Enclosed type isothermal warm room structure -   221, 231: Fluid piping -   222: Auxiliary isothermal piping -   223: Thermal conducting fin type structure -   250: Periodic fluid direction change operative control device (250) -   251: Metering device -   252: Flow control valve

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As is well known, normal stable temperature of utility water no matter in summer or winter is usually around 12-20° C., wherein for the isothermal method and device using periodic direction-change utility water flow, the water inside underground water pipe buried in the earth layers in the utility water system being used as the thermal energy transfer fluid having its thermal energy is directly transferred to the closed water pipe constructed on the earth surface or indirectly transferred by thermal conduction method to the thermal energy transfer fluid of another closed water pipe; further, the thermal energy transfer fluid is pumped by the pump for periodic flow direction change so as via the isothermal device to constitute the isothermal thermal energy transfer between the utility water thermal energy and the one of thermal energy transfer target thereby saving energy consumption by replacing or providing assistances to conventional high energy consuming devices.

FIG. 1 is a piping layout between conventional utility water piping and the building, wherein:

-   (101) is the earth surface; -   (102) is the earth layer which has a normal temperature between     12-20° C.; -   (103) is the underground water pipe of conventional utility water     system being buried in earth layer (102); -   (104) is the water supply branch pipe being connected between user     water valve (111) and underground water pipe (103) to supply utility     system water to the user; -   (111) is the water valve in user's building (110) for water flow     switching operation to obtain the water randomly.

The aforesaid layout when applied in extreme cold winter, internal water in the portion of conventional water branch pipe (104) being located near to earth surface (101) or exposed out of earth surface (101) is easily frozen to clog the water flow due to extreme coldness.

The present invention innovatively discloses a particular piping of utility water system, wherein utility water flowing inside the piping is the thermal energy transfer fluid, or the thermal energy is indirectly transferred to the thermal energy transfer fluid in another closed piping circuit, and is further through the pump to pump the thermal energy transfer fluid for periodical flow directional change and thereby through an isothermal device to isothermally transfer thermal energy between the utility water thermal energy and the earth surface target.

FIG. 2 is the structure schematic view of the present invention showing that the utility water piping is through the close loop divided piping directly constituted by water pipe, fluid pump and isothermal device to provide indoor isothermal function inside the building, wherein it mainly comprises that:

-   The underground water pipe (103): It is buried in the earth layer     (102) for transferring utility water system water flow, wherein the     underground water pipe (103) can be constituted by conventional     tubular structure, or geometric shaping structures favorable for     thermal transfer, and made of various materials with good thermal     conductivity such as metal or other thermal conductive materials     thereby allowing passing utility water to transfer thermal energy     and to rely on the underground water pipe (103) itself to transfer     earth layer thermal energy; further the underground water pipe (103)     can be optionally series connected with an isothermal device (122)     as needed to enhance earth layer thermal energy transfer effect; -   The closed water pipe (121): The closed water pipe (121) itself can     be made of conventional tubular structure, or geometrical structures     and materials favorable for thermal energy transfer to appear single     flow circuit or multi-flow circuits or closed flow circuit in     particular bended shape, wherein it is installed at the location     closer to the earth surface (101) than the underground water pipe     (103), or at the location to expose out of the earth surface (101),     or is buried inside the building (110) itself, or is installed at     selected spaces near to the top, or wall, or interior of floor, or     near to the ground or near to the siding in the interior or exterior     of the building, wherein the inlet end of closed water pipe (121) is     connected with the underground water pipe (103) to introduce water     flow from the underground water pipe (103) and further through     another section of the underground water pipe (103) being connected     with the outlet end of closed water pipe (121) to return water flow     back to the underground water pipe (103) thereby constituting the     divided flow circuit of the utility water flow and through the     divided utility water flow for isothermal thermal energy transfer;     further, the closed water pipe (121) can be optionally series     connected with the isothermal device (122) and installed with the     bidirectional fluid pumping device (123) as needed to pump the water     flow for periodically direction exchange, and can be optionally     installed with a metering device (251) and a flow control valve     (252) as needed; -   The isothermal device (122): The isothermal device (122) being made     of material with good thermal conductivity has a geometric structure     shape favorable for thermal conduction; the isothermal device (122)     having a flow inlet, an internal flow passage thereof and a flow     outlet is series connected with the underground water pipe (103) or     series connected with closed water pipe (121) inside the building     (110) for isothermally transferring the thermal energy of passing     water flow with the peripheral thermal energy of the isothermal     device (122); the device can be optionally installed as needed to     series connect with both or one of the underground water pipe (103),     or closed water pipe (121) inside building (110), or it can be     optionally selected not to be installed; -   The bidirectional fluid pumping device (123): It is a fluid pumping     device capable of producing positive pressure to push fluid or     producing negative pressure to suck fluids for pumping water flow to     transfer thermal energy, wherein the pump can be driven by electric     motor, engine power, or mechanical or electric power converted from     other wind energy, thermal energy, temperature-difference energy, or     solar energy, etc.; wherein constitutions of the fluid pumping     device capable of making periodic direction-change pumping include     the following: -   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with an     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.

Besides, the isothermal method and device using periodic direction-change utility water flow of the present invention can also be applied in outdoor public facilities, wherein as it is well known that underground water piping of utility water system is usually buried under public road or other outdoor public places. The snow accumulation or frozen ice on the road may cause traffic difficulties and affect safety, hence the isothermal method and device using periodic direction-change utility water flow can be applied for isothermal energy transfer of the shallow earth layer in public roads or applied for exposed type isothermal energy transfer in outdoor public places.

FIG. 3 is a structural schematic view showing the isothermal functioning system of the present invention being applied for shallow earth surface layer; wherein it mainly comprises the following:

-   The underground water pipe (103): It is buried in the earth layer     (102) for transferring utility water system water flow, wherein the     underground water pipe (103) can be constituted by conventional     tubular structure, or geometric shaping structures favorable for     thermal transfer, and made of various materials with good thermal     conductivity such as metal or other thermal conductive materials     thereby allowing passing utility water to transfer thermal energy     and to rely on the underground water pipe (103) itself to transfer     earth layer thermal energy, further the underground water pipe (103)     can be optionally series connected with an isothermal device (122)     as needed to enhance earth layer thermal energy transfer effect; -   The closed water pipe (121): The closed water pipe (121) itself can     be made of conventional tubular structure, or geometrical structures     and materials favorable for thermal energy transfer to appear single     flow circuit or multi-flow circuits or closed flow circuit in     particular bended shape, wherein it is installed at the location     closer to the earth surface (101) than the underground water pipe     (103) to appear closed water flow circuit, wherein the inlet end of     closed water pipe (121) is connected with the underground water pipe     (103) to introduce water flow from the underground water pipe (103)     and further through another section of the underground water pipe     (103) being connected with the outlet end of closed water pipe (121)     to return water flow back to the underground water pipe (103)     thereby constituting the water flow circuit for isothermal energy     transfer through water flow; further, the closed water pipe (121)     can be optionally series connected with the isothermal device (122)     and installed with the bidirectional fluid pumping device (123) as     needed, and can be optionally installed with a metering device (251)     and a flow control valve (252) as needed; -   The isothermal device (122): The isothermal device (122) being made     of material with good thermal conductivity has a geometrical     structure shape favorable for thermal conduction; the isothermal     device (122) having a flow inlet, an internal flow passage thereof     and a flow outlet is series connected with the underground water     pipe (103) or series connected with the closed water pipe (121) for     isothermally transferring the thermal energy of passing water flow     with the peripheral thermal energy of the isothermal device (122);     the device can be optionally installed as needed to series connect     with both or one of the underground water pipe (103), or closed     water pipe (121) near to earth surface, or it can be optionally     selected not to be installed. -   The bidirectional fluid pumping device (123): It is a fluid pumping     device capable of producing positive pressure to push fluid or     producing negative pressure to suck fluids for pumping water flow to     transfer thermal energy, wherein the pump can be driven by electric     motor, engine power, or mechanical or electric power converted from     other wind energy, thermal energy, temperature-difference energy, or     solar energy, etc.; wherein constitutions of the fluid pumping     device capable of making periodic direction-change pumping include     the following: -   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.

FIG. 4 is a structural schematic view showing the isothermal functioning system of the present invention being applied for the target being externally exposed out of the earth surface; wherein it mainly comprises the following:

-   The underground water pipe (103): It is buried in the earth layer     (102) for transferring utility water system water flow, wherein the     underground water pipe (103) can be constituted by conventional     tubular structure, or geometric shaping structures favorable for     thermal transfer, and made of various materials with good thermal     conductivity such as metal or other thermal conductive materials     thereby allowing passing utility water to transfer thermal energy     and to rely on the underground water pipe (103) itself to transfer     earth layer thermal energy, further the underground water pipe (103)     can be optionally series connected with an isothermal device (122)     as needed to enhance earth layer thermal energy transfer effect; -   The closed water pipe (121): The closed water pipe (121) itself can     be made of conventional tubular structure, or geometrical structures     and materials favorable for thermal energy transfer to appear single     flow circuit or multi-flow circuits or closed flow circuit in     particular bended shape, wherein it is installed at the location to     expose out of earth surface (101) to appear closed water flow     circuit, wherein the inlet end of closed water pipe (121) is     connected with the underground water pipe (103) to introduce water     flow from the underground water pipe (103) and further through     another section of the underground water pipe (103) being connected     with the outlet end of closed water pipe (121) to return water flow     back to the underground water pipe (103) thereby constituting the     water flow circuit for isothermal thermal energy transfer through     water flow; further, the closed water pipe (121) can be optionally     series connected with the isothermal device (122) and installed with     the bidirectional fluid pumping device (123) as needed, and can be     optionally installed with a metering device (251) and a flow control     valve (252) as needed; -   The isothermal device (122): The isothermal device (122) being made     of material with good thermal conductivity has a geometrical     structure shape favorable for thermal conduction; the isothermal     device (122) having a flow inlet, an internal flow passage thereof     and a flow outlet is series connected with the underground water     pipe (103) or series connected with the closed water pipe (121) for     isothermally transferring the thermal energy of passing water flow     with the peripheral thermal energy of the isothermal device (122);     the device can be optionally installed as needed to series connect     with both or one of the underground water pipe (103), or the closed     water pipe (121) being exposed out of earth surface, or it can be     optionally selected not to be installed; -   The bidirectional fluid pumping device (123): It is a fluid pumping     device capable of producing positive pressure to push fluid or     producing negative pressure to suck fluids for pumping water flow to     transfer thermal energy, wherein the pump can be driven by electric     motor, engine power, or mechanical or electric power converted from     other wind energy, thermal energy, temperature-difference energy, or     solar energy, etc.; wherein constitutions of the fluid pumping     device capable of making periodic direction-change pumping include     the following: -   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.

FIG. 5 is a structural schematic view showing the isothermal functioning system of the present invention being applied in the interior of building top structure; wherein it mainly comprises the following:

-   The underground water pipe (103): It is buried in the earth layer     (102) for transferring utility water system water flow, wherein the     underground water pipe (103) can be constituted by conventional     tubular structure, or geometric shaping structures favorable for     thermal transfer, and made of various materials with good thermal     conductivity such as metal or other thermal conductive materials     thereby allowing passing utility water to transfer thermal energy     and to rely on the underground water pipe (103) itself to transfer     earth layer thermal energy, further the underground water pipe (103)     can be optionally series connected with an isothermal device (122)     as needed to enhance earth layer thermal energy transfer effect; -   The closed water pipe (121): The closed water pipe (121) itself can     be made of conventional tubular structure, or geometrical structures     and materials favorable for thermal energy transfer to appear single     flow circuit or multi-flow circuits or closed flow circuit in     particular bended shape, wherein it is installed inside the top     structure of a building (110) to appear a closed water flow circuit,     wherein the inlet end of closed water pipe (121) is connected with     the underground water pipe (103) to introduce water flow from the     underground water pipe (103) and further through another section of     the underground water pipe (103) being connected with the outlet end     of closed water pipe (121) to return water flow back to the     underground water pipe (103) thereby constituting the water flow     circuit for isothermal energy transfer through water flow; further,     the closed water pipe (121) can be optionally series connected with     the isothermal device (122) and installed with the bidirectional     fluid pumping device (123) as needed, and can be optionally     installed with a metering device (251) and a flow control valve     (252) as needed; -   The isothermal device (122): The isothermal device (122) being made     of material with good thermal conductivity has a geometrical     structure shape favorable for thermal conduction; the isothermal     device (122) having a flow inlet, an internal flow passage thereof     and a flow outlet is series connected with the underground water     pipe (103) or series connected with the closed water pipe (121) for     isothermally transferring the thermal energy of passing water flow     with the peripheral thermal energy of the isothermal device (122);     the device can be optionally installed as needed to series connect     with both or one of the underground water pipe (103), or closed     water pipe (121) inside the top structure of a building (110), or it     can be optionally selected not to be installed; -   The bidirectional fluid pumping device (123): It is a fluid pumping     device capable of producing positive pressure to push fluid or     producing negative pressure to suck fluids for pumping water flow to     transfer thermal energy, wherein the pump can be driven by electric     motor, engine power, or mechanical or electric power converted from     other wind energy, thermal energy, temperature-difference energy, or     solar energy, etc.; wherein constitutions of the fluid pumping     device capable of making periodic direction-change pumping include     the following: -   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.

FIG. 6 is a structural schematic view showing the isothermal functioning system of the present invention being applied to be externally exposed on top of the building; wherein it mainly comprises the following:

-   The underground water pipe (103): It is buried in the earth layer     (102) for transferring utility water system water flow, wherein the     underground water pipe (103) can be constituted by conventional     tubular structure, or geometric shaping structures favorable for     thermal transfer, and made of various materials with good thermal     conductivity such as metal or other thermal conductive materials     thereby allowing passing utility water to transfer thermal energy     and to rely on the underground water pipe (103) itself to transfer     earth layer thermal energy, further the underground water pipe (103)     can be optionally series connected with an isothermal device (122)     as needed to enhance earth layer thermal energy transfer effect; -   The closed water pipe (121): The closed water pipe (121) itself can     be made of conventional tubular structure, or geometrical structures     and materials favorable for thermal energy transfer to appear single     flow circuit or multi-flow circuits or closed flow circuit in     particular bended shape, wherein it is installed on the top of a     building (110) to appear an externally exposed closed water flow     circuit, wherein the inlet end of closed water pipe (121) is     connected with the underground water pipe (103) to introduce water     flow from underground water pipe (103) and further through another     section of the underground water pipe (103) being connected with the     outlet end of closed water pipe (121) to return water flow back to     the underground water pipe (103) thereby constituting the water flow     circuit for isothermal energy transfer through water flow; further,     the closed water pipe (121) can be optionally series connected with     the isothermal device (122) and installed with the bidirectional     fluid pumping device (123) as needed, and can be optionally     installed with a metering device (251) and a flow control valve     (252) as needed; -   The isothermal device (122): The isothermal device (122) being made     of material with good thermal conductivity has a geometric structure     shape favorable for thermal conduction; the isothermal device (122)     having a flow inlet, an internal flow passage thereof and a flow     outlet is series connected with the underground water pipe (103) or     series connected with the externally exposed closed water pipe (121)     on the top of a building (110) for isothermally transferring the     thermal energy of passing water flow with the peripheral thermal     energy of the isothermal device (122); the device can be optionally     installed as needed to series connect with both or one of the     underground water pipe (103), or the externally exposed closed water     pipe (121) on the top of a building (110), or it can be optionally     selected not to be installed; -   The bidirectional fluid pumping device (123): It is a fluid pumping     device capable of producing positive pressure to push fluid or     producing negative pressure to suck fluids for pumping water flow to     transfer thermal energy, wherein the pump can be driven by electric     motor, engine power, or mechanical or electric power converted from     other wind energy, thermal energy, temperature-difference energy, or     solar energy, etc.; wherein constitutions of the fluid pumping     device capable of making periodic direction-change pumping include     the following: -   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.

The isothermal effects of the isothermal method and device using periodic direction-change utility water flow of the present invention include the following:

-   1) Lowering temperature of the thermal energy transferring target on     earth surface by the utility water and geo-thermal energy of     relatively lower temperature; -   2) Raising temperature of the thermal energy transferring target on     earth surface by the utility water and geo- thermal energy of     relatively higher temperature;

Embodiments for isothermal device (122) of the isothermal method and device using periodic direction-change utility water flow of the present invention can be selected as follows:

-   1) The isothermal device (122) is installed in the underground layer     to series connect with the underground water pipe (103); or -   2) The isothermal device (122) is installed near to earth surface or     being exposed out of earth surface to series connect with the closed     water pipe (121); or -   3) Both underground water pipe (103) and closed water pipe (121) are     all series connected with the isothermal device (122); or -   4) Both underground water pipe (103) and closed water pipe (121) are     not installed with the isothermal device (122).

The isothermal device (122) of the isothermal method and device using periodic direction-change utility water flow of the present invention can be optionally installed in considering the application occasions and cost effectiveness, wherein besides of installing isothermal device (122), the isothermal functions of the isothermal device (122) can also be achieved by the underground water pipe (103) or the closed water pipe (121) themselves, or the isothermal function is enhanced by additionally installing a structure body having good thermal conductivity at the outside of underground water pipe (103) or the outside of closed water pipe (121).

Further, to promote the integral efficiency, the isothermal method and device using periodic direction-change utility water flow of the present invention can be additionally installed with insulation material between the underground water pipe (103) and the closed water pipe (121) being externally exposed out of or near to earth surface (101) according to construction environment or function requirements, or this section of closed water pipe (121) can be made of insulation material to avoid thermal energy loss.

For the isothermal method and device using periodic direction-change utility water flow of the present invention, the connection relationships between the closed water pipe (121) and the underground water pipe (103) include the following:

-   1) The flow inlet of closed water pipe (121) can be connected to the     upstream end of underground water pipe (103) while the flow outlet     is connected to its downstream end; or -   2) The flow inlet of closed water pipe (121) can be connected to the     downstream end of underground water pipe (103) while the flow outlet     is connected to its upstream end.

For the isothermal method and device using periodic direction-change utility water flow of the present invention, the bidirectional fluid pumping device (123) for pumping flow can be optionally installed in considering the application occasions and cost effectiveness, wherein besides of installing bidirectional fluid pumping device (123) for pumping water flow to be the thermal energy carrier, the cold-drop, hot-rise convection effect can be utilized to form water circulating flow, or the divided water flow formed by water flow of underground water pipe (103) is passed through closed water pipe (121) to be the thermal energy transfer fluid for isothermal thermal energy transfer, wherein beside that water flow passing through closed water pipe (121) is pumped by the bidirectional fluid pumping device (123), the methods for moving water flow include the following:

-   1) The cold-drop, hot-rise convection effect of the water flow in     different flow directions forms the circulating water flow, wherein     circulating water flow is deemed as the thermal energy transfer     fluid for isothermal heat transfer and is used to operatively     control the fluid valve for periodic flow direction change; or -   2) The underground water piping flow in different flow directions is     installed to introduce water flow from the flow inlet of closed     water pipe (121) being connected to the upstream end at a particular     angle such as that sharp angle <90° to the flow direction of     underground water pipe (103) and appear positive pressure is     favorable for introducing water flow to enter closed water pipe     (121), while the flow outlet of closed water pipe (121) being at a     particular angle such as >90° obtuse angle to underground water pipe     (103) flow direction and appear negative pressure is favorable for     water discharge via the flow outlet of closed water pipe (121) so as     to converge with water flow of underground water pipe (103) thereby     forming the divided flow effect, wherein the divided water flow     passing through closed water pipe (121) is deemed as the thermal     energy transfer fluid for isothermal heat transfer and is used to     operatively control the fluid valve for periodic flow direction     change; or -   3) Through one or more than one method of the water flow pumping,     clod-drop, hot-rise effect or divided flow effect, water flow passes     through the closed circuit water pipe (121), so as the water flow is     deemed as the thermal energy transfer fluid for isothermal heat     transfer.

The isothermal method and device using periodic direction-change utility water flow of the present invention can be simultaneously applied by combining closed water pipe (121) and water supply branch pipe (104), wherein partial conventional water supply branch pipe (104) is used as the common water pipe to combine with partial closed water pipe (121) so as to constitute the integrated type closed water flow circuit, and if the integrated type closed water circuit is optionally installed with bidirectional fluid pumping device (123), then it can be that:

-   1) The bidirectional fluid pumping device (123) is installed to the     closed water pipe (121); or -   2) The bidirectional fluid pumping device (123) is installed to the     common pipe.

For the isothermal method and device using periodic direction-change utility water flow of the present invention, at least one or more than one effect and effectiveness by adopting the integrated type closed water flow circuit are as the following, include:

-   1) By carrying water flow of higher thermal energy, it can avoid the     portion near to earth surface (101) and the exposed portion of the     conventional water supply branch pipe (104) to be frozen with ice     due to too low temperature at the outside; or -   2) By carrying water flow of lower thermal energy, temperature of     the building itself or inside the building can be lowered during     summer times; or -   3) By carrying water flow of higher thermal energy, it is possible     to maintain higher temperature than the one of external environment     during cold winter without heating, or it can be applied to the     warehouse storage, or to melt away the accumulated snow on the     rooftops to avoid frozen ice.

For the isothermal method and device using periodic direction-change utility water flow of the present invention, the thermal energy transfer method can be further constituted by indirect thermal energy transferring structures, wherein underground or aboveground utility piping of utility water system is provided with the enclosed type isothermal warm room structure, wherein thermal energy of utility piping inside water flow is transferred to the target indirectly by allowing the gaseous or liquid state fluid inside the enclosed type isothermal warm room to pass through the isothermal target such as the open space, building or the internal space of other closed or semi-closed structure thereby indirectly conducting thermal energy for the isothermal energy transfer.

FIG. 7 is a schematic view of the embodiment showing that the present invention is installed with enclosed type isothermal warm room structure to perform open loop type fluid circulation in the open space; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the open space via fluid piping (221) and the fluid in the open space is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to open space via fluid piping (231), and the fluid in the open space is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer thermal energy of utility water system to the open space. The above said fluid piping (221) and fluid piping (231) being individually connected to open space is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.

FIG. 8 is a schematic view of the system embodiment showing that the present invention is installed with an enclosed type isothermal warm room structure to indirectly perform open loop type fluid circulation in the building or internal spaces of other closed or semi-closed building structures; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal places of other closed or semi-closed structures on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or internal spaces of other closed or semi-closed structures. The above said fluid piping (221) and fluid piping (231) being individually connected to the building (110) or internal spaces of other closed or semi-closed structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further, constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.

FIG. 9 is a schematic view of the system embodiment showing that the present invention is installed with an enclosed type isothermal warm room structure to indirectly perform closed loop type fluid circulation in the open space; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the isothermal device (122) in the open space via fluid piping (221) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to the isothermal device (122) in the open space via fluid piping (231) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the open space via the isothermal device (122). The above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) in the open space is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer, wherein constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.

FIG. 10 is a schematic view of the system embodiment showing that the present invention is installed with an enclosed type isothermal warm room structure to indirectly perform closed loop type fluid circulation in the building or internal spaces of other closed or semi-closed building structures; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal places of other closed or semi-closed structures on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to the isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or other closed or semi-closed structures via the isothermal device (122). The above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) installed in the building (110) or internal spaces of other closed or semi-closed structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer, wherein constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.

For the isothermal method and device using periodic direction-change utility water flow of the present invention, the underground or aboveground utility piping can also be installed with the thermal energy conduction structure in parallel, such as the auxiliary isothermal energy piping of heat conducting fin type structures for mutual thermal energy transfer is provided to allow the gaseous or liquid state fluid for passing through the target to perform isothermal energy transfer between the internal water flow thermal energy inside utility water piping of the underground utility water system and the one of target.

FIG. 11 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform open loop type fluid circulation in the open space; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the open space via fluid piping (221) and the fluid in the open space is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to the open space via fluid piping (231) and the fluid in the open space is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the open space. The above said fluid piping (221) and fluid piping (231) being individually connected to open space is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further the constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.

FIG. 12 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform open loop type fluid circulation in the building or internal spaces of other closed or semi-closed structures; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal spaces of other closed or semi-closed structures at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or internal spaces of other closed or semi-closed structures. The above said fluid piping (221) and fluid piping (231) being individually connected to the building (110) or internal spaces of other closed type structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further the constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.

FIG. 13 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform closed loop type fluid circulation in the open space; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the isothermal device (122) in the open space via fluid piping (221) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to the isothermal device (122) in the open space via fluid piping (231) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the open space via isothermal device (122). The above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) installed in the open space of the target and it is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer; further the constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control the     bidirectional fluid pumping device (123) for periodically changing     the flow direction of the thermal energy modulating targeting     thermal fluid thereby operatively controlling the temperature     difference distribution status between the thermal fluid and the     thermal energy modulating target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein the metering device and flow control valve can be installed as needed.

FIG. 14 is a schematic view of the system embodiment showing that the present invention is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform closed loop type fluid circulation in the buildings or internal spaces of other closed or semi-closed structures; the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal spaces of other closed or semi-closed structures at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed. Said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or internal spaces of other closed type structures via isothermal device (122). The above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) in the building (110) or internal spaces of other closed type structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer, wherein constitutions of said bidirectional fluid pumping device (123) include the following:

-   1. It is by adopting a bidirectional pumping fluid pump to suck and     discharge the thermal fluid, wherein the flow direction of thermal     fluid is periodically changed by periodically operating the pump in     positive or reverse direction; or -   2. It is constituted by two unidirectional pumps of different     pumping directions in series connection, wherein they are     respectively reversely parallel connected with the unidirectional     valve for periodically alternatively pumping to periodically     exchange the thermal fluid flow direction; or -   3. It is constituted by two unidirectional pumps of different     pumping directions in parallel connection making periodic     alternative pumping to periodically exchange the thermal fluid flow     directions, wherein if the pumps has no static anti-reverse flow     characteristics, they can be respectively series connected with a     unidirectional valve to avoid reverse flow; therefore the two pumps     of different pumping directions are alternatively pumped to     periodically exchange the thermal fluid flow directions; or -   4. It is constituted by an unidirectional flow pump and four     controllable switch type fluid valves in bridge type combination,     wherein thermal fluid flow direction is periodically changed by     alternatively operatively control two fluid valves to open and the     other two fluid valves to close in the operation of the     unidirectional flow pump; -   The periodic fluid direction change operative control device (250):     It is constituted by electromechanical components, solid state     electronic components, or microprocessors and relevant software and     operative control interfaces to operatively control bidirectional     fluid pumping device (123) thereby making flow direction of the     thermal energy modulating targeting thermal fluid be changed     periodically so as to operatively control the temperature difference     distribution status between the thermal fluid and warming control     target;

The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein the metering device and flow control valve can be installed as needed.

Targets of the isothermal method and device using periodic direction-change utility water flow of the present invention for isothermal operations include the following:

1) All kinds of open spaces, or

2) Open earth surface spaces, or

3) Shallow earth surface layers, or

4) Internal spaces of semi-closed or closed type buildings, or

5) Internal spaces of other semi-closed or closed type structures.

For the isothermal method and device using periodic direction-change utility water flow of the present invention, besides of providing general housing functions, the internal spaces of the buildings described in aforesaid embodiments including building of houses, warehouses, column bodies, or other geometric shape buildings, or other special buildings constituted by semi-closed or closed type structures being designed as needed can be further provided with one or more than one of the following devices for isothermal adjustments, wherein the application devices include:

-   -   1) Equipment devices having demands for particular environments         such as tool machineries, inspection instruments, observing         instruments, industrial equipments, machineries, power machines,         electrical machines, etc., or     -   2) Heat-damaging devices or components with heat dissipation         requirements such as heat-dissipating cooling devices,         electricity storage devices, lamps, LEDs, semi-conductors, etc.,         or     -   3) Spaces or warehouses storing solid state, liquid state or         gaseous chemicals.

In which natural thermal energy of utility water system is used to cool the equipments and devices, or the natural thermal energy of utility water system is used to keep isothermal warmth of the equipments and devices.

As summarized from above descriptions, the isothermal method and device using periodic direction-change utility water flow of the present invention is made through the thermal energy of utility water itself or the natural geothermal energy (about 12-16° C.) of the earth layer being absorbed by underground water pipe, and further through 1) directly using the utility water flow as the thermal fluid, or 2) indirectly through the fluid piping circuit, the bidirectional fluid pumping device (123) as well as the optional metering device and the optional flow control valve specially installed near to earth surface, or to be exposed aboveground, or inside the building to constitute the closed piping circuit having internal gaseous or liquid state thermal fluid, wherein the methods of 1) & 2) are further through the pump being used to change fluid pumping flow direction or the directional valve being operatively controlled to achieve periodic fluid flow direction-change inside the closed water pipe thereby constituting the isothermal heat transfer. As it has the characteristics of low cost and convenient construction with clear functions, it is then applied for patent herein, and your approval according to law is greatly appreciated. 

1. An isothermal method and device using periodic direction-change utility water flow which uses the water inside underground water pipe buried in the earth layers in the utility water system as the thermal energy transfer fluid having its thermal energy being directly transferred to the closed water pipe constructed on the earth surface or indirectly transferred by thermal conduction method to the thermal energy transfer fluid of another closed water pipe; further, the thermal energy transfer fluid is pumped by the pump for periodic flow direction change so as via the isothermal device to constitute the isothermal thermal energy transfer between the utility water thermal energy and the one of thermal energy transfer target.
 2. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein it is mainly comprises the following: The underground water pipe (103): It is buried in the earth layer (102) for transferring utility water system water flow, wherein the underground water pipe (103) can be constituted by conventional tubular structure, or geometric shaping structures favorable for thermal transfer, and made of various materials with good thermal conductivity such as metal or other thermal conductive materials thereby allowing passing utility water to transfer thermal energy and to rely on the underground water pipe (103) itself to transfer earth layer thermal energy; further the underground water pipe (103) can be optionally series connected with an isothermal device (122) as needed to enhance earth layer thermal energy transfer effect; The closed water pipe (121): The closed water pipe (121) itself can be made of conventional tubular structure, or geometrical structures and materials favorable for thermal energy transfer to appear single flow circuit or multi-flow circuits or closed flow circuit in particular bended shape, wherein it is installed at the location closer to the earth surface (101) than the underground water pipe (103), or at the location to expose out of the earth surface (101), or is buried inside the building (110) itself, or is installed at selected spaces near to the top, or wall, or interior of floor, or near to the ground or near to the siding in the interior or exterior of the building, wherein the inlet end of closed water pipe (121) is connected with the underground water pipe (103) to introduce water flow from the underground water pipe (103) and further through another section of the underground water pipe (103) being connected with the outlet end of closed water pipe (121) to return water flow back to the underground water pipe (103) thereby constituting the divided flow circuit of the utility water flow and through the divided utility water flow for isothermal thermal energy transfer; further, the closed water pipe (121) can be optionally series connected with the isothermal device (122) and installed with the bidirectional fluid pumping device (123) as needed to pump the water flow for periodically direction exchange, and can be optionally installed with a metering device (251) and a flow control valve (252) as needed; The isothermal device (122): The isothermal device (122) being made of material with good thermal conductivity has a geometric structure shape favorable for thermal conduction; the isothermal device (122) having a flow inlet, an internal flow passage thereof and a flow outlet is series connected with the underground water pipe (103) or series connected with closed water pipe (121) inside the building (110) for isothermally transferring the thermal energy of passing water flow with the peripheral thermal energy of the isothermal device (122); the device can be optionally installed as needed to series connect with both or one of the underground water pipe (103), or closed water pipe (121) inside building (110), or it can be optionally selected not to be installed; The bidirectional fluid pumping device (123): It is a fluid pumping device capable of producing positive pressure to push fluid or producing negative pressure to suck fluids for pumping water flow to transfer thermal energy, wherein the pump can be driven by electric motor, engine power, or mechanical or electric power converted from other wind energy, thermal energy, temperature-difference energy, or solar energy, etc.; wherein constitutions of the fluid pumping device capable of making periodic direction-change pumping include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with an unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; o 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.
 3. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, which can be applied for isothermal energy transfer of the shallow earth layer in public roads or applied for exposed type isothermal energy transfer in outdoor public places, wherein it mainly comprises the following: The underground water pipe (103): It is buried in the earth layer (102) for transferring utility water system water flow, wherein the underground water pipe (103) can be constituted by conventional tubular structure, or geometric shaping structures favorable for thermal transfer, and made of various materials with good thermal conductivity such as metal or other thermal conductive materials thereby allowing passing utility water to transfer thermal energy and to rely on the underground water pipe (103) itself to transfer earth layer thermal energy, further the underground water pipe (103) can be optionally series connected with an isothermal device (122) as needed to enhance earth layer thermal energy transfer effect; The closed water pipe (121): The closed water pipe (121) itself can be made of conventional tubular structure, or geometrical structures and materials favorable for thermal energy transfer to appear single flow circuit or multi-flow circuits or closed flow circuit in particular bended shape, wherein it is installed at the location closer to the earth surface (101) than the underground water pipe (103) to appear closed water flow circuit, wherein the inlet end of closed water pipe (121) is connected with the underground water pipe (103) to introduce water flow from the underground water pipe (103) and further through another section of the underground water pipe (103) being connected with the outlet end of closed water pipe (121) to return water flow back to the underground water pipe (103) thereby constituting the water flow circuit for isothermal energy transfer through water flow; further, the closed water pipe (121) can be optionally series connected with the isothermal device (122) and installed with the bidirectional fluid pumping device (123) as needed, and can be optionally installed with a metering device (251) and a flow control valve (252) as needed; The isothermal device (122): The isothermal device (122) being made of material with good thermal conductivity has a geometrical structure shape favorable for thermal conduction; the isothermal device (122) having a flow inlet, an internal flow passage thereof and a flow outlet is series connected with the underground water pipe (103) or series connected with the closed water pipe (121) for isothermally transferring the thermal energy of passing water flow with the peripheral thermal energy of the isothermal device (122); the device can be optionally installed as needed to series connect with both or one of the underground water pipe (103), or closed water pipe (121) near to earth surface, or it can be optionally selected not to be installed; The bidirectional fluid pumping device (123): It is a fluid pumping device capable of producing positive pressure to push fluid or producing negative pressure to suck fluids for pumping water flow to transfer thermal energy, wherein the pump can be driven by electric motor, engine power, or mechanical or electric power converted from other wind energy, thermal energy, temperature-difference energy, or solar energy, etc.; wherein constitutions of the fluid pumping device capable of making periodic direction-change pumping include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.
 4. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein it is applied for the target exposed out of the earth surface, wherein it mainly comprises the following: The underground water pipe (103): It is buried in the earth layer (102) for transferring utility water system water flow, wherein the underground water pipe (103) can be constituted by conventional tubular structure, or geometric shaping structures favorable for thermal transfer, and made of various materials with good thermal conductivity such as metal or other thermal conductive materials thereby allowing passing utility water to transfer thermal energy and to rely on the underground water pipe (103) itself to transfer earth layer thermal energy, further the underground water pipe (103) can be optionally series connected with an isothermal device (122) as needed to enhance earth layer thermal energy transfer effect; The closed water pipe (121): The closed water pipe (121) itself can be made of conventional tubular structure, or geometrical structures and materials favorable for thermal energy transfer to appear single flow circuit or multi-flow circuits or closed flow circuit in particular bended shape, wherein it is installed at the location to expose out of earth surface (101) to appear closed water flow circuit, wherein the inlet end of closed water pipe (121) is connected with the underground water pipe (103) to introduce water flow from the underground water pipe (103) and further through another section of the underground water pipe (103) being connected with the outlet end of closed water pipe (121) to return water flow back to the underground water pipe (103) thereby constituting the water flow circuit for isothermal thermal energy transfer through water flow; further, the closed water pipe (121) can be optionally series connected with the isothermal device (122) and installed with the bidirectional fluid pumping device (123) as needed, and can be optionally installed with a metering device (251) and a flow control valve (252) as needed; The isothermal device (122): The isothermal device (122) being made of material with good thermal conductivity has a geometrical structure shape favorable for thermal conduction; the isothermal device (122) having a flow inlet, an internal flow passage thereof and a flow outlet is series connected with the underground water pipe (103) or series connected with the closed water pipe (121) for isothermally transferring the thermal energy of passing water flow with the peripheral thermal energy of the isothermal device (122); the device can be optionally installed as needed to series connect with both or one of the underground water pipe (103), or the closed water pipe (121) being exposed out of earth surface, or it can be optionally selected not to be installed; The bidirectional fluid pumping device (123): It is a fluid pumping device capable of producing positive pressure to push fluid or producing negative pressure to suck fluids for pumping water flow to transfer thermal energy, wherein the pump can be driven by electric motor, engine power, or mechanical or electric power converted from other wind energy, thermal energy, temperature-difference energy, or solar energy, etc.; wherein constitutions of the fluid pumping device capable of making periodic direction-change pumping include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.
 5. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein it is applied in the interior of building top structure; wherein it mainly comprises the following: The underground water pipe (103): It is buried in the earth layer (102) for transferring utility water system water flow, wherein the underground water pipe (103) can be constituted by conventional tubular structure, or geometric shaping structures favorable for thermal transfer, and made of various materials with good thermal conductivity such as metal or other thermal conductive materials thereby allowing passing utility water to transfer thermal energy and to rely on the underground water pipe (103) itself to transfer earth layer thermal energy, further the underground water pipe (103) can be optionally series connected with an isothermal device (122) as needed to enhance earth layer thermal energy transfer effect; The closed water pipe (121): The closed water pipe (121) itself can be made of conventional tubular structure, or geometrical structures and materials favorable for thermal energy transfer to appear single flow circuit or multi-flow circuits or closed flow circuit in particular bended shape, wherein it is installed inside the top structure of a building (110) to appear a closed water flow circuit, wherein the inlet end of closed water pipe (121) is connected with the underground water pipe (103) to introduce water flow from the underground water pipe (103) and further through another section of the underground water pipe (103) being connected with the outlet end of closed water pipe (121) to return water flow back to the underground water pipe (103) thereby constituting the water flow circuit for isothermal energy transfer through water flow; further, the closed water pipe (121) can be optionally series connected with the isothermal device (122) and installed with the bidirectional fluid pumping device (123) as needed, and can be optionally installed with a metering device (251) and a flow control valve (252) as needed; The isothermal device (122): The isothermal device (122) being made of material with good thermal conductivity has a geometrical structure shape favorable for thermal conduction; the isothermal device (122) having a flow inlet, an internal flow passage thereof and a flow outlet is series connected with the underground water pipe (103) or series connected with the closed water pipe (121) for isothermally transferring the thermal energy of passing water flow with the peripheral thermal energy of the isothermal device (122); the device can be optionally installed as needed to series connect with both or one of the underground water pipe (103), or closed water pipe (121) inside the top structure of a building (110), or it can be optionally selected not to be installed; The bidirectional fluid pumping device (123): It is a fluid pumping device capable of producing positive pressure to push fluid or producing negative pressure to suck fluids for pumping water flow to transfer thermal energy, wherein the pump can be driven by electric motor, engine power, or mechanical or electric power converted from other wind energy, thermal energy, temperature-difference energy, or solar energy, etc.; wherein constitutions of the fluid pumping device capable of making periodic direction-change pumping include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.
 6. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein it is applied on the top of a building to appear externally exposed; wherein it mainly comprises the following: The underground water pipe (103): It is buried in the earth layer (102) for transferring utility water system water flow, wherein the underground water pipe (103) can be constituted by conventional tubular structure, or geometric shaping structures favorable for thermal transfer, and made of various materials with good thermal conductivity such as metal or other thermal conductive materials thereby allowing passing utility water to transfer thermal energy and to rely on the underground water pipe (103) itself to transfer earth layer thermal energy, further the underground water pipe (103) can be optionally series connected with an isothermal device (122) as needed to enhance earth layer thermal energy transfer effect; The closed water pipe (121): The closed water pipe (121) itself can be made of conventional tubular structure, or geometrical structures and materials favorable for thermal energy transfer to appear single flow circuit or multi-flow circuits or closed flow circuit in particular bended shape, wherein it is installed on the top of a building (110) to appear an externally exposed closed water flow circuit, wherein the inlet end of closed water pipe (121) is connected with the underground water pipe (103) to introduce water flow from underground water pipe (103) and further through another section of the underground water pipe (103) being connected with the outlet end of closed water pipe (121) to return water flow back to the underground water pipe (103) thereby constituting the water flow circuit for isothermal energy transfer through water flow; further, the closed water pipe (121) can be optionally series connected with the isothermal device (122) and installed with the bidirectional fluid pumping device (123) as needed, and can be optionally installed with a metering device (251) and a flow control valve (252) as needed; The isothermal device (122): The isothermal device (122) being made of material with good thermal conductivity has a geometric structure shape favorable for thermal conduction; the isothermal device (122) having a flow inlet, an internal flow passage thereof and a flow outlet is series connected with the underground water pipe (103) or series connected with the externally exposed closed water pipe (121) on the top of a building (110) for isothermally transferring the thermal energy of passing water flow with the peripheral thermal energy of the isothermal device (122); the device can be optionally installed as needed to series connect with both or one of the underground water pipe (103), or the externally exposed closed water pipe (121) on the top of a building (110), or it can be optionally selected not to be installed; The bidirectional fluid pumping device (123): It is a fluid pumping device capable of producing positive pressure to push fluid or producing negative pressure to suck fluids for pumping water flow to transfer thermal energy, wherein the pump can be driven by electric motor, engine power, or mechanical or electric power converted from other wind energy, thermal energy, temperature-difference energy, or solar energy, etc.; wherein constitutions of the fluid pumping device capable of making periodic direction-change pumping include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow.
 7. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein the isothermal effects include lowering temperature of the thermal energy transferring target on earth surface by the utility water and geo-thermal energy of relatively lower temperature.
 8. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein the isothermal effects include raising temperature of the thermal energy transferring target on earth surface by the utility water and geo- thermal energy of relatively higher temperature.
 9. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein embodiments for isothermal device (122) can be selected as follows: 1) The isothermal device (122) is installed in the underground layer to series connect with the underground water pipe (103); or 2) The isothermal device (122) is installed near to earth surface or being exposed out of earth surface to series connect with the closed water pipe (121); or 3) Both underground water pipe (103) and closed water pipe (121) are all series connected with the isothermal device (122); or 4) Both underground water pipe (103) and closed water pipe (121) are not installed with the isothermal device (122).
 10. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein the isothermal device (122) can be optionally installed in considering the application occasions and cost effectiveness, wherein besides of installing isothermal device (122), the isothermal functions of the isothermal device (122) can also be achieved by the underground water pipe (103) or the closed water pipe (121) themselves, or the isothermal function is enhanced by additionally installing a structure body having good thermal conductivity at the outside of underground water pipe (103) or the outside of closed water pipe (121).
 11. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein it can be additionally installed with insulation material between the underground water pipe (103) and the closed water pipe (121) being externally exposed out of or near to earth surface (101) according to construction environment or function requirements, or this section of closed water pipe (121) can be made of insulation material to avoid thermal energy loss.
 12. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein the connection relationships between the closed water pipe (121) and the underground water pipe (103) include the following: 1) The flow inlet of closed water pipe (121) can be connected to the upstream end of underground water pipe (103) while the flow outlet is connected to its downstream end; or 2) The flow inlet of closed water pipe (121) can be connected to the downstream end of underground water pipe (103) while the flow outlet is connected to its upstream end.
 13. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein the bidirectional fluid pumping device (123) for pumping flow can be optionally installed in considering the application occasions and cost effectiveness, wherein besides of installing bidirectional fluid pumping device (123) for pumping water flow to be the thermal energy carrier, the cold-drop, hot-rise convection effect can be utilized to form water circulating flow, or the divided water flow formed by water flow of underground water pipe (103) is passed through closed water pipe (121) to be the thermal energy transfer fluid for isothermal thermal energy transfer, wherein beside that water flow passing through closed water pipe (121) is pumped by the bidirectional fluid pumping device (123), the methods for moving water flow include the following: 1) The cold-drop, hot-rise convection effect of the water flow in different flow directions forms the circulating water flow, wherein circulating water flow is deemed as the thermal energy transfer fluid for isothermal heat transfer and is used to operatively control the fluid valve for periodic flow direction change; or 2) The underground water piping flow in different flow directions is installed to introduce water flow from the flow inlet of closed water pipe (121) being connected to the upstream end at a particular angle such as that sharp angle <90° to the flow direction of underground water pipe (103) and appear positive pressure is favorable for introducing water flow to enter closed water pipe (121), while the flow outlet of closed water pipe (121) being at a particular angle such as >90° obtuse angle to underground water pipe (103) flow direction and appear negative pressure is favorable for water discharge via the flow outlet of closed water pipe (121) so as to converge with water flow of underground water pipe (103) thereby forming the divided flow effect, wherein the divided water flow passing through closed water pipe (121) is deemed as the thermal energy transfer fluid for isothermal heat transfer and is used to operatively control the fluid valve for periodic flow direction change; or 3) Through one or more than one method of the water flow pumping, clod-drop, hot-rise effect or divided flow effect, water flow passes through the closed circuit water pipe (121), so as the water flow is deemed as the thermal energy transfer fluid for isothermal heat transfer.
 14. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein it is simultaneously applied by combining closed water pipe (121) and water supply branch pipe (104), wherein partial conventional water supply branch pipe (104) is used as the common water pipe to combine with partial closed water pipe (121) so as to constitute the integrated type closed water flow circuit, and if the integrated type closed water circuit is optionally installed with bidirectional fluid pumping device (123), then it can be that: 1) The bidirectional fluid pumping device (123) is installed to the closed water pipe (121); or 2) The bidirectional fluid pumping device (123) is installed to the common pipe.
 15. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 1, wherein at least one or more than one effect and effectiveness by adopting the integrated type closed water flow circuit are as the following, include: 1) By carrying water flow of higher thermal energy, it can avoid the portion near to earth surface (101) and the exposed portion of the conventional water supply branch pipe (104) to be frozen with ice due to too low temperature at the outside; or 2) By carrying water flow of lower thermal energy, temperature of the building itself or inside the building can be lowered during summer times; or 3) By carrying water flow of higher thermal energy, it is possible to maintain higher temperature than the one of external environment during cold winter without heating, or it can be applied to the warehouse storage, or to melt away the accumulated snow on the rooftops to avoid frozen ice.
 16. An isothermal method and device using periodic direction-change utility water flow, the thermal energy transfer method can be further constituted by indirect thermal energy transferring structures, wherein underground or aboveground utility piping of utility water system is provided with the enclosed type isothermal warm room structure, wherein thermal energy of utility piping inside water flow is transferred to the target indirectly by allowing the gaseous or liquid state fluid inside the enclosed type isothermal warm room to pass through the isothermal target such as the open space, building or the internal space of other closed or semi-closed structure thereby indirectly conducting thermal energy for the isothermal energy transfer.
 17. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 16, wherein it is installed with enclosed type isothermal warm room structure to perform open loop type fluid circulation in the open space, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the open space via fluid piping (221) and the fluid in the open space is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to open space via fluid piping (231), and the fluid in the open space is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer thermal energy of utility water system to the open space; the above said fluid piping (221) and fluid piping (231) being individually connected to open space is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.
 18. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 16, wherein it is installed with an enclosed type isothermal warm room structure to indirectly perform open loop type fluid circulation in the building or internal spaces of other closed or semi-closed building structures, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal places of other closed or semi-closed structures on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or internal spaces of other closed or semi-closed structures; the above said fluid piping (221) and fluid piping (231) being individually connected to the building (110) or internal spaces of other closed or semi-closed structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further, constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.
 19. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 16, wherein it is installed with an enclosed type isothermal warm room structure to indirectly perform closed loop type fluid circulation in the open space, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the isothermal device (122) in the open space via fluid piping (221) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to the isothermal device (122) in the open space via fluid piping (231) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the open space via the isothermal device (122); the above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) in the open space is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer, wherein constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.
 20. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 16, wherein it is installed with an enclosed type isothermal warm room structure to indirectly perform closed loop type fluid circulation in the building or internal spaces of other closed or semi-closed building structures, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is provided with an enclosed type isothermal warm room structure (220) being closed at both ends thereof, wherein it is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal places of other closed or semi-closed structures on one side near the closed end surface thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through enclosed type isothermal warm room structure (220) to the isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (231), or it is sent to the isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to enclosed type isothermal warm room structure (220) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or other closed or semi-closed structures via the isothermal device (122); the above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) installed in the building (110) or internal spaces of other closed or semi-closed structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer, wherein constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.
 21. An isothermal method and device using periodic direction-change utility water flow, wherein the underground or aboveground utility piping is installed with the thermal energy conduction structure in parallel, such as the auxiliary isothermal energy piping of heat conducting fin type structures for mutual thermal energy transfer is provided to allow the gaseous or liquid state fluid for passing through the target to perform isothermal energy transfer between the internal water flow thermal energy inside utility water piping of the underground utility water system and the one of target.
 22. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 21, wherein it is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform isothermal open loop type fluid circulation in the open space, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the open space via fluid piping (221) and the fluid in the open space is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to the open space via fluid piping (231) and the fluid in the open space is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the open space; the above said fluid piping (221) and fluid piping (231) being individually connected to open space is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further the constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.
 23. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 21, wherein it is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform isothermal open loop type fluid circulation in the building or internal spaces of other closed or semi-closed structures; whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal spaces of other closed or semi-closed structures at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or internal spaces of other closed or semi-closed structures; the above said fluid piping (221) and fluid piping (231) being individually connected to the building (110) or internal spaces of other closed type structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform open loop type fluid circulation of periodic flow direction-change, wherein fluid inlet and outlet of fluid piping (221) and fluid piping (231) can be optionally installed with a filter device (124) or not to be installed; further the constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein metering device and flow control valve can be installed as needed.
 24. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 21, wherein it is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform isothermal closed loop type fluid circulation in the open space, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to open space at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to open space on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the isothermal device (122) in the open space via fluid piping (221) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to the isothermal device (122) in the open space via fluid piping (231) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the open space via isothermal device (122); the above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) installed in the open space of the target and it is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer; further the constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the thermal energy modulating targeting thermal fluid thereby operatively controlling the temperature difference distribution status between the thermal fluid and the thermal energy modulating target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein the metering device and flow control valve can be installed as needed.
 25. An isothermal method and device using periodic direction-change utility water flow as claimed in claim 21, wherein it is installed with an auxiliary isothermal piping in parallel to utility piping so as to indirectly perform isothermal closed loop type fluid circulation in the buildings or internal spaces of other closed or semi-closed structures, whereof the system includes that the peripheral surrounding of one section of the underground water pipe (103) in the utility water system is parallel provided with at least one auxiliary isothermal piping (222) being able to mutually transfer thermal energy, wherein the two can be made to an integral body, or mutually connected structures for facilitating thermal energy transfer as required, or the thermal conducting fin type structure (223) or other thermal conducting structure or heat pipe device can be installed between the two to indirectly transfer the thermal energy of water flow inside the underground water pipe (103) in the utility water system to the fluid inside the auxiliary isothermal piping (222), wherein two ends of the auxiliary isothermal piping (222) is installed with at least one fluid inlet (218) and one fluid piping (221) for connection to the building (110) or internal spaces of other closed or semi-closed structures at one end thereof, and is installed with at least one fluid outlet (219) and one fluid piping (231) for connection to the building (110) or internal spaces of other closed or semi-closed structures on another end thereof, thereby allowing gaseous or liquid state fluid to flow in and out, and a metering device (251) and a flow control valve (252) can be optionally installed as needed; whereof said fluid is convectively circulated by the cold-drop, hot-rise effect, or is installed with a bidirectional fluid pumping device (123) being driven by electric motor, or other mechanical power or manpower to pump fluid passing through auxiliary isothermal piping (222) to the isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (221) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (231), or it is sent to isothermal device (122) in the building (110) or internal spaces of other closed or semi-closed structures via fluid piping (231) and the fluid is then returned to auxiliary isothermal piping (222) via fluid piping (221) thus performing the isothermal energy transfer to indirectly transfer the thermal energy of utility water system to the building (110) or internal spaces of other closed type structures via isothermal device (122); the above said fluid piping (221) and fluid piping (231) being individually connected to the isothermal device (122) in the building (110) or internal spaces of other closed type structures is through the bidirectional fluid pumping device (123) to be operatively controlled by periodic fluid direction change operative control device (250) to perform closed loop type fluid circulation of periodic flow direction-change for isothermal transfer, wherein constitutions of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting a bidirectional pumping fluid pump to suck and discharge the thermal fluid, wherein the flow direction of thermal fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by two unidirectional pumps of different pumping directions in series connection, wherein they are respectively reversely parallel connected with the unidirectional valve for periodically alternatively pumping to periodically exchange the thermal fluid flow direction; or 3) It is constituted by two unidirectional pumps of different pumping directions in parallel connection making periodic alternative pumping to periodically exchange the thermal fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with a unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the thermal fluid flow directions; or 4) It is constituted by an unidirectional flow pump and four controllable switch type fluid valves in bridge type combination, wherein thermal fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close in the operation of the unidirectional flow pump; The periodic fluid direction change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control bidirectional fluid pumping device (123) thereby making flow direction of the thermal energy modulating targeting thermal fluid be changed periodically so as to operatively control the temperature difference distribution status between the thermal fluid and warming control target; The timing for periodic change can be 1) the open loop type operative control by presetting the direction-change period of thermal fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between the thermal fluid setting value and the one of thermal energy modulating target to control the direction-change period of thermal fluid flow, wherein the metering device and flow control valve can be installed as needed.
 26. An isothermal method and device using periodic direction-change utility water flow as claimed in claims 1, 16 or 21, wherein isothermal operations include the following: 1) All kinds of open spaces, or 2) Open earth surface spaces, or 3) Shallow earth surface layers, or 4) Internal spaces of semi-closed or closed type buildings, or 5) Internal spaces of other semi-closed or closed type structures.
 27. An isothermal method and device using periodic direction-change utility water flow as claimed in claims 1, 16 or 21, wherein besides of providing general housing functions, the internal spaces of the buildings described in aforesaid embodiments including building of houses, warehouses, column bodies, or other geometric shape buildings, or other special buildings constituted by semi-closed or closed type structures being designed as needed can be further provided with one or more than one of the following devices for isothermal adjustments, wherein the application devices include: 1) Equipment devices having demands for particular environments such as tool machineries, inspection instruments, observing instruments, industrial equipments, machineries, power machines, electrical machines, etc., or 2) Heat-damaging devices or components with heat dissipation requirements such as heat-dissipating cooling devices, electricity storage devices, lamps, LEDs, semi-conductors, etc., or 3) Spaces or warehouses storing solid state, liquid state or gaseous chemicals; In which natural thermal energy of utility water system is used to cool the equipments and devices, or the natural thermal energy of utility water system is used to keep isothermal warmth of the equipments and devices. 